摘要
通过震群活动的震兆特征和预报效能分析表明 ,1976～ 2 0 0 0年 ,临河断陷盆地共有 10次震群活动 ,其中 7次为前兆震群。前兆震群一般出现在中强地震前 5～ 10个月 ,距离主震为 40～ 10 0km左右。 1976年 9月至2 0 0 1年 6月 ,临河断陷盆地及边缘附近共发生MS≥ 4 8地震 7次 ,采用前兆震群方法报对 5次 ,漏报 2次 ,虚报 2次 ,预报效能评分R =0 6
The prediction potency and precursory features of earthquake swarm activities are studied.The results show there were 7 precursory swarms with earthquake swarms activity among 10 events in the Linhe down-faulted basin from 1976 to 2000.Generally,the precursory swarms appeared in 5～10 months before medium-strong earthquakes,with distance 40～100 Km to principal earthquakes.The 7 earthquakes(Ms≥4.8)occurred in the Linhe down-faulted basin and its margin from September 1976 to June 2001,and the prediction was made using of the precursory swarm method,with the 5 of right,the 2 of absence,the 2 of error and its prediction potency scoring was R=0.66.
出处
《地震研究》
CSCD
北大核心
2002年第1期31-35,共5页
Journal of Seismological Research
关键词
临河断陷盆地
震群
震兆特征
预报效能
地震预报
Linhe down-faulted basin
earthquake swarms
seismic precursor features
prediction potency
